4113021521 has 4 divisors (see below), whose sum is σ = 4700596032. Its totient is φ = 3525447012.

The previous prime is 4113021469. The next prime is 4113021533. The reversal of 4113021521 is 1251203114.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4113021521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4113021493 and 4113021502.

It is not an unprimeable number, because it can be changed into a prime (4113021421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293787245 + ... + 293787258.

It is an arithmetic number, because the mean of its divisors is an integer number (1175149008).

Almost surely, 2^4113021521 is an apocalyptic number.

It is an amenable number.

4113021521 is a deficient number, since it is larger than the sum of its proper divisors (587574511).

4113021521 is an equidigital number, since it uses as much as digits as its factorization.

4113021521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587574510.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 4113021521 is about 64132.8427640628. The cubic root of 4113021521 is about 1602.2132808360.

Adding to 4113021521 its reverse (1251203114), we get a palindrome (5364224635).

The spelling of 4113021521 in words is "four billion, one hundred thirteen million, twenty-one thousand, five hundred twenty-one".